Austenoferritic stainless steel having a very low nickel content and a high tensile elongation
US6096441A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 30, 1998 |
| Grant date | Aug 1, 2000 |
| Priority date | — |
| Expiry date | Jun 30, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12979
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
An austenoferritic stainless steel with high tensile elongation includes iron and the following elements in the indicated weight amounts based on total weight: PA1 carbon<0.04% PA1 0.4%<silicon<1.2% PA1 2%<manganese<4% PA1 0.1%<nickel<1% PA1 18%<chromium<22% PA1 0.05%<copper<4% PA1 sulfur<0.03% PA1 phosphorus<0.1% PA1 0.1%<nitrogen<0.3% PA1 molybdenum<3% the steel having a two-phase structure of austenite and ferrite and comprising between 30% and 70% of austenite, wherein PA1 Creq=Cr %+Mo %+1.5 Si % PA1 Nieq=Ni %+0.33 Cu %+0.5 Mn %+30 C %+30 N % PA1 and Creq/Nieq is from 2.3 to 2.75, and wherein IM=551-805(C+N)%--8.52 Si %--8.57 Mn %--12.51 Cr %--36 Ni %--34.5 Cu %--14 Mo %, PA1 IM being from 40 to 115.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.